International Day for the Preservation of the Ozone Layer

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2023 DateSeptember 16, 2023
2024 DateSeptember 16, 2024

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International Day for the Preservation of the Ozone Layer

The International Day for the Preservation of the Ozone Layer serves as a reminder of the importance of safeguarding the Earth's fragile ozone layer. This observance aims to raise awareness about the consequences of ozone depletion and encourages worldwide cooperation to reduce the release of ozone-depleting substances. As a result, efforts to protect the ozone layer play a vital role in mitigating climate change, conserving biodiversity, and promoting human health.

The United Nations established the International Day for the Preservation of the Ozone Layer in 1994, following the Montreal Protocol on Substances that Deplete the Ozone Layer. This international agreement, to which the United States is a party, has been remarkably effective in slashing the global production and use of ozone-depleting substances. As a leader in scientific research and technological innovation, the United States plays a key role in advancing global efforts to protect the ozone layer. Due to its significant reduction in emissions, the American public has experienced health benefits in the form of fewer instances of skin cancer and cataracts from reduced UV exposure.

The International Day for the Preservation of the Ozone Layer is observed annually on September 16th. Events typically include educational workshops, seminars, and promotional campaigns that highlight the importance of preserving the ozone layer and the progress made since the Montreal Protocol. These activities reinforce the United States' commitment toward global environmental cooperation and remind individuals of the small actions they can take to benefit the planet's overall health.

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Facts about the Ozone Layer

  • The theme for International Day for the Preservation of the Ozone Layer in 2020 was 30 Years of Healing the Ozone Together.
  • The natural level of ozone in the stratosphere is a result of a balance between sunlight that creates ozone and chemical reactions that destroy it.
  • The thinning of the ozone layer is caused by chemicals, such as chlorofluorocarbons (CFCs), carbon tetrachloride, halons, and others. These chemicals -- often used in refrigeration, air conditioning, packaging, insulation, aerosols, and so on -- release chlorine and bromine when they come in contact with sunlight. These elements then deplete the ozone layer.
  • DuPont, an American company, was the largest producer of CFCs in the world during the peak period of ODS production. After evidence emerged regarding the damage caused by these substances, DuPont became a leader in phasing out their production.
  • Despite progress, challenges remain in ozone layer preservation, especially due to illegal production and import of banned substances. The EPA takes an active role in prosecuting those involved in such activities.
  • The American Geophysical Union has reported that since the 1987 Montreal Protocol, the rate of ozone depletion has slowed and signs of recovery have been detected.

Top things to do in the US for this observance

  • Watch Ozone Hole: How We Saved The Planet, a PBS documentary that chronicles the discovery of the ozone hole above Antarctica.
  • Read Chemistry of the Natural Atmosphere by Peter Warneck.
  • Stay updated on current events, research discoveries, and policy developments related to the ozone layer. Subscribe to reputable environmental news sources or set up Google alerts to receive regular updates.

References and related sites

un.org/en/observances/ozone-day/ UN: International Day for the Preservation

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